The estimated toll underscores the violence the government has deployed against dissenters. DUBAI, United Arab Emirates (AP) — Activists said Tuesday that Iran’s bloody crackdown on nationwide protests killed at least 6,126 people while many others still are feared dead, as a U.S. aircraft carrier group arrived in the Mideast to lead any American military response to the crisis. The arrival of the USS Abraham Lincoln aircraft carrier and guided missile destroyers accompanying it provide the U.S.